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Linh Van Hong BUI; Phuoc Trong NGUYEN
《结构与土木工程前沿(英文)》 2022年 第16卷 第7期 页码 843-857 doi: 10.1007/s11709-022-0834-0
关键词: embedded through-section strengthening fiber-reinforced polymer finite element shear strength model bond mechanism
Mechanism and control of the long-term performance evolution of structures
Zhiqiang DONG, Gang WU, Hong ZHU, Haitao WANG, Yihua ZENG
《结构与土木工程前沿(英文)》 2020年 第14卷 第5期 页码 1039-1048 doi: 10.1007/s11709-020-0667-7
关键词: degradation mechanism performance evaluation strengthening FRP FRCM
傅杰,李光强,于月光,毛新平,方克明
《中国工程科学》 2011年 第13卷 第1期 页码 31-42
简要叙述了关于钢强化机理的研究现状,用化学相分析+X射线小角散射、RTO方法及高分辨透射电镜对薄板坯连铸连轧钛微合金化高强耐候钢中纳米粒子的属性进行了综合分析。发现钛微合金化高强耐候钢中尺寸<36 nm的粒子,除纳米TiC以外,还存在大量的纳米Fe3C,其体积分数为同尺寸TiC体积分数的4.4倍,析出强化作用比纳米TiC粒子大,不可忽略;提出了钢的综合强化机理,指出对不同种类、不同尺寸的纳米析出粒子,应分别根据位错切割和位错绕过机理计算出析出强化贡献,然后与固溶强化和细晶强化贡献加和,求得钢的屈服强度;讨论了细晶强化与位错强化不能加和的原因以及相变对钢强度影响的表现形式, 对钛微合金化高强耐候钢屈服强度的理论计算与生产结果相符,实验钢 σs = 630~676 MPa,实际 σs=630~680 MPa。 简述了钢综合强化机理的应用情况,指出了有待进一步研究的科学问题。
《结构与土木工程前沿(英文)》 页码 1100-1116 doi: 10.1007/s11709-023-0967-9
关键词: fiber-reinforced cementitious matrix flexural strengthening shear strengthening carbon fiber-reinforced polymer shear span
STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 503-509 doi: 10.15302/J-FASE-2023528
STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT
关键词: GREEN AGRICULTURAL PROMOTE POLLUTION SOURCE DEVELOPMENT POINT STRENGTHENING CONTROL
Experimental monitoring of the strengthening construction of a segmental box girder bridge and field
Ali Fadhil NASER, Zonglin WANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 308-320 doi: 10.1007/s11709-012-0140-3
关键词: prestressed concrete box girder monitoring external tendons strain deflection
《结构与土木工程前沿(英文)》 2022年 第16卷 第2期 页码 145-160 doi: 10.1007/s11709-022-0806-4
关键词: strain-hardening cementitious composites engineered cementitious composites sprayable shotcrete strengthening concrete-face rockfill dam digital image correlation
卢亦焱,陈娟,黄银燊,吴涛
《中国工程科学》 2008年 第10卷 第8期 页码 40-44
围绕国内外预应力FRP加固技术的研究现状以及最新进展,从预应力FRP加固混凝土结构、预应力FRP加固钢结构、预应力FRP加固中关键技术的研究等方面进行了综述。试验研究表明:预应力FRP加固混凝土能显著提高构件的开裂荷载、屈服荷载和极限荷载,改善受弯构件在长期荷载的力学性能,提高构件的疲劳寿命;预应力CFRP加固钢梁后,其屈服荷载和极限荷载相对于对比梁都有明显的提高,其提高的程度随着预应力CFRP的用量和预应力水平的提高而增大;预应力CFRP加固对钢梁的刚度提高作用也比较明显,对低强度的钢材,提高效果更明显;采用预应力FRP加固工程结构的关键问题在于预应力的施加体系、预应力控制值、预应力损失和端部的锚固。
Shouping SHANG , Fangyuan ZHOU , Wei LIU ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 330-338 doi: 10.1007/s11709-009-0046-x
关键词: RC beams high-performance ferrocement laminate (HPFL) inorganic material reinforcement
一种具有超高温工程应用潜力的氮化物增强NbMoTaWHfN难熔高熵合金 Article
万义兴, 程延海, Yongxiong Chen, Zhibin Zhang, Yanan Liu, Haijun Gong, Baolong Shen, Xiubing Liang
《工程(英文)》 2023年 第30卷 第11期 页码 110-120 doi: 10.1016/j.eng.2023.06.008
Refractory high-entropy alloys (RHEAs) have promising applications as the new generation of high-temperature alloys in hypersonic vehicles, aero-engines, gas turbines, and nuclear power plants. This study focuses on the microstructures and mechanical properties of the NbMoTaW(HfN)x (x = 0, 0.3, 0.7, and 1.0) RHEAs. The alloys consist of multiple phases of body-centered cubic (BCC), hafnium nitride (HfN), or multicomponent nitride (MN) phases. As the x contents increase, the grain size becomes smaller, and the strength gradually increases. The compressive yield strengths of the NbMoTaWHfN RHEA at ambient temperature, 1000, 1400, and 1800 °C were found to be 1682, 1192, 792, and 288 MPa, respectively. The high-temperature strength of this alloy is an inspiring result that exceeds the high temperature and strength of most known alloys, including high-entropy alloys, refractory metals, and superalloys. The HfN phase has a significant effect on strengthening due to its high structural stability and sluggish grain coarsening, even at ultra-high temperatures. Its superior properties endow the NbMoTaWHfN RHEA with potential for a wide range of engineering applications at ultra-high temperatures. This work offers a strategy for the design of high-temperature alloys and proposes an ultra-high-temperature alloy with potential for future engineering applications.
关键词: Refractory high-entropy alloy High temperature Mechanical property Microstructure Strengthening mechanism
Evelyn Chalmers, Yi Li, Xuqing Liu
《化学科学与工程前沿(英文)》 2019年 第13卷 第4期 页码 684-694 doi: 10.1007/s11705-019-1817-0
关键词: supercapacitor polypyrrole hydrogel strengthening electrochemical
标题 作者 时间 类型 操作
Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars
Linh Van Hong BUI; Phuoc Trong NGUYEN
期刊论文
Mechanism and control of the long-term performance evolution of structures
Zhiqiang DONG, Gang WU, Hong ZHU, Haitao WANG, Yihua ZENG
期刊论文
Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated
期刊论文
Experimental monitoring of the strengthening construction of a segmental box girder bridge and field
Ali Fadhil NASER, Zonglin WANG
期刊论文
Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious
期刊论文
Calculation of diagonal section and cross-section bending capacity for strengthening RC structure using
Shouping SHANG , Fangyuan ZHOU , Wei LIU ,
期刊论文
一种具有超高温工程应用潜力的氮化物增强NbMoTaWHfN难熔高熵合金
万义兴, 程延海, Yongxiong Chen, Zhibin Zhang, Yanan Liu, Haijun Gong, Baolong Shen, Xiubing Liang
期刊论文
Molecular tailoring to improve polypyrrole hydrogels’ stiffness and electrochemical energy storage capacity
Evelyn Chalmers, Yi Li, Xuqing Liu
期刊论文